normal#FEATURES1highlight#FEATURES0Ontario Geotechnical BoreholesProduct Information]]>This database contains Geotechnical Borehole records. Each well provides information on the Geological Stratum identified down hole as well as the depths. Zoom in to view data.

A borehole is the generalized term for any narrow shaft drilled in the ground, either vertically or horizontally. A borehole may be constructed for many different purposes including the extraction of water or fluid (such as oil) or gases (such as natural gas or methane), as part of a geotechnical investigation or environmental site assessment, for mineral exploration, or as a pilot hole for installing piers or underground utilities. This database contains a continuous log of strata for each borehole as well as for geocolumns. A geocolumn is a collection of information from an examination of exposed substrate, such as in a quarry wall or along a roadway passage.

Boreholes of all types contribute to the delineation of the earth's subsurface, which includes aquifers. The extent and character of aquifers is important to Source Water Protection Planning and to broader water management.
Accuracy of borehole location and elevation data varies depending on data source.

This database should not be relied on as a precise indicator of borehole locations. Ontario's Ministry of Energy, Northern Development and Mines, Mines and Minerals Division, Ontario Geological Survey (OGS) and the Ministry of Natural Resources (MNR) shall not be liable in any way for the use of, or reliance upon, any information in this database.